CN2331027Y - Object image scanning device - Google Patents

Abstract

A device for scanning the image of a static or quasi-static object by using a linear charge coupled device (Linear CCD), wherein the image of the object is projected onto a scanning area, and the linear CCD is moved to all parts of the scanning area, so that the linear CCD can sense the image of all parts of the object until all the images of the object are sensed. This scanning method replaces the conventional array-type linear charge coupled device (ArrayCCD) with a linear charge coupled device (ccd), so it allows more than ten times the resolution at the same cost as the conventional scanning method.

Description

Scanning device for object image

The utility model relates to a scanning device, in particular to an object image scanning device for object image scanning.

Commonly used digital cameras use array charge-coupled devices (ArrayCCD) to sense object images, so the improvement of image resolution depends on the resolution capability of the array charge-coupled devices, which makes high-quality images must be supported at high cost. Taking a 1/3×1/3 inch array charge-coupled device as an example, the number of pixels is generally 640×480, and a 300dpi linear charge-coupled device with a length of 21.7mm is used to scan an A4-sized document , the result is that the number of pixels can reach 2500×3500. To achieve a resolution of 2500×3500 pixels with a commonly used array of charge-coupled devices, the cost will be so high that it is unrealistic.

FIG. 4 illustrates a common way to scan an object image with an arrayed charge-coupled device. In the figure, the lens 52 is used to project the image of the object 54 onto the arrayed charge-coupled device 51, and the object placement area 53 is used to place the object to be scanned. . Wherein the arrayed charge-coupled device 51 (assuming that the number of pixels is 640×480) must sense all the images of the object 54 at the same time, no matter what the size of the object 54 or how dense its images are, the images in the arrayed charge-coupled device It can only be represented by the number of pixels 640×480, of course, its resolution is severely limited. The scanning device provided by the utility model aims to improve the shortcomings of this common method, so that the image of the object 54 can be scanned to be represented by a pixel number up to ten times higher.

The purpose of the utility model is to provide a device to improve the resolution of object image scanning and reduce the cost of object image scanning.

Another object of the present invention is to provide a method and device for scanning images of static or quasi-static objects using a linear charge-coupled device (LinearCCD), so as to improve image scanning resolution or reduce image scanning costs.

To achieve the above purpose, a scanning device for sensing an image of an object of the present invention includes;

A lens is used to project images of various parts of the object on different parts of a scanning area; a sensor is used to sense images and output electrical signals according to the sensed images; and a driver is used to move The sensor is made to reach various parts of the scanning area, so that the sensor successively senses images of various parts of the object projected by the lens on the scanning area. Wherein the sensor is a linear charge-coupled device (LinearCCD). In this way, as long as a linear charge-coupled device (LinearCCD) with a resolution several times higher than that of a commonly used array CCD but at a lower cost can effectively improve the image scanning resolution.

Since the lens in the scanning device projects images of different parts of the object on different parts of the scanning area, the sensor can sense images of different parts of the object at different parts of the scanning area. As long as the lens projects images of all parts of the object in the scanning area, and the sensor can reach all parts of the scanning area, the sensor can sense all parts of the object of the image.

Obviously, the driver can make the sensor reach various parts of the scanning area in an automatic manner. Every time the driver makes the sensor reach a working part of the scanning area, after the sensor senses the image of the object projected by the lens on the working part, it makes the sensor reach another Operation parts, repeat this action until the sensor senses images of all parts of the object. With this simple operation method and relatively low hardware cost, the scanning device can provide high-resolution scanning effects. It is worth mentioning that the driver can move the sensor to reach various parts of the scanning area at a constant speed, so as to simplify the structure of the device.

In practice, the lens, sensor, driver, etc. provided by the utility model can be combined into a scanner similar to a camera structure, which is equipped with a pivot, which is convenient to be fixed on a bracket on the one hand, and can be used on the other hand. By rotating the scanner, the scanner can scan objects from different angles.

It can be understood that the lens used can also be other optical elements, the only condition is that the optical element can project images of all parts of the object in the scanning area in a non-overlapping manner, so as to facilitate scanning one by one. sensed by a linear electrical coupling. It can be deduced from this that the optical element does not have to be between the object to be scanned and the scanning area.

Since a considerable proportion of scanned objects are static or quasi-static, and these static or quasi-static objects allow a linear charge-coupled device (×) with lower cost and higher resolution to detect Scan the images of all its parts one by one, so the utility model provides this kind of scanning device, so that it can still obtain extremely high resolution in the image sensing operation of static or quasi-static objects under the condition of low cost degree effect. In fact, the function of the present invention is that the scanning speed can be adjusted to increase the resolution to any level.

In order to better understand the utility model, please refer to the accompanying drawings and preferred embodiments below for further description:

Fig. 1 illustrates an embodiment of an image scanning device of the present invention, which uses an image sensor (a linear charge-coupled device) to move successively to various parts of a scanning area, so as to sense all parts of an object images of parts;

Fig. 2 illustrates a kind of mode of operation of the utility model;

Fig. 3 illustrates another kind of mode of operation of the present utility model;

FIG. 4 illustrates the operation method of a common object image sensing device.

Please refer to Fig. 1, in Fig. 1 there are object placement area 27, lens 26, linear charge-coupled device (LinearCCD) 24, light-receiving area 25 of linear charge-coupled device 24, screw rod 22 and transmission group 21 forming the driver, and Scan area 23. The object placement area 27 is used to place the object 28 to be scanned, and the lens 26 is used to project images of various parts of the object 28 in the object placement area 27 to different parts of the scanning area 23 . There is a mechanical connection between the screw 22 and the transmission group 21 and the linear charge-coupled device 24. When the transmission group 21 is subjected to an external force or receives the output power of the automatic control mechanism, the rotation of the screw 22 will drive the linear charge-coupled device 24. Move within the scanning area 23 (moving direction is shown by arrow AB in the figure). As long as all parts of the object placed in the object placement area 27, the image projected on the scanning area 23 through the lens 26 can be received by the light receiving area 25 of the movable linear charge-coupled device 24, then placed in the object placement area 27 of the entire image of the object can be sensed by the linear charge device 24, and of course the entire image of the object can be converted into a corresponding electrical signal.

It can be understood that the lens 26 can also be replaced by other optical elements, the only condition is that the optical element can project images of all parts of the object in the object placement area 27 in the scanning area 23 in a non-overlapping manner , so as to be received by the light-receiving area 25 of the linear charge-coupled device 24 one by one. It can be inferred from this that the optical element does not have to be between the object placing area 27 and the scanning area 23 .

Figure 2 shows the operation method of the object image scanning device of the present invention. Wherein scanner or video camera 31 (include the combination of scanning zone and driver and lens 26), be installed on one side of support 30 by pivot 29, pivot 29 can be used for this scanner 31 to rotate accordingly, makes this scanner 31 to scan the object 28 from different angles. The base 32 is used for placing the object 28 , and the light source 33 illuminates the object 28 so that its image is projected on the scanning area of the camera 31 through the lens 26 .

In Fig. 3, the object image scanning device of the present invention (scanner 31 containing scanning area, driver, lens 26, etc.) By rotating, the scanner 31 can scan the object 28 from different angles. The bracket 30 is stabilized by the base 32 , and the light source 33 illuminates the object 28 so that its image is projected on the scanning area of the camera or scanner 31 through the lens 26 .

It can be seen from the above description that the utility model can make a digital camera or a scanner to be produced at a lower cost, but it can have a resolution effect more than ten times higher than that of conventional products. The utility model uses a pivot to provide the operation mode of the scanner to rotate, so that the scanner can scan objects from different angles, which notably improves the convenience of the scanning operation, and can also expand the range of the size and type of the scanned objects.

Claims (4)

1. the scanister of the image of a usefulness what sensing one object, it is characterized in that: it comprises;

One lens are in order to the image projection what one scan district with this object;

One wire charge-coupled device (CCD) is in order to sensing image;

One driver moves each position that this wire charge-coupled device (CCD) arrives this scanning area, so that this wire charge-coupled device (CCD) senses the image at each position of this object one by one.

2. scanister as claimed in claim 1, it is characterized in that: these lens are with the different parts of this scanning area of image projection what of the different parts of this object, so that this wire charge-coupled device (CCD) senses the image of the different parts of this object at the different parts of this scanning area.

3. scanister as claimed in claim 1, it is characterized in that: when this driver makes this wire charge-coupled device (CCD) arrive an operation position of this scanning area each time, treat that this wire charge-coupled device (CCD) senses image Hou of this object at this this operation position of lens projects what, make this wire charge-coupled device (CCD) arrive another operation position again, sense up to this wire charge-coupled device (CCD) till the image at all each positions of this object.

4. as claim 1 a described scanister, it is characterized in that: more comprise a pivot, and this driver of this scanister, this wire charge-coupled device (CCD), this scanning area etc. are connected as a body, and can rotate around this pivot, so that this wire charge-coupled device (CCD) is from the image of variant this object of angle sensing.

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